We could not analyze gene-dose effects of these alleles on the risk of BD because all patients carrying HLA-A*02:07, HLA-A*26:01, HLA-A*30:04, or HLA-A*33:03 allele were heterozygotes except two patients with HLA-A*02:07 allele and one with HLA-A*33:03 allele. This evidence concerns the gene HLA-A and Behcet disease.